729320 has 16 divisors (see below), whose sum is σ = 1641060. Its totient is φ = 291712.

The previous prime is 729301. The next prime is 729329. The reversal of 729320 is 23927.

It can be written as a sum of positive squares in 2 ways, for example, as 729316 + 4 = 854^2 + 2^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 729320.

It is not an unprimeable number, because it can be changed into a prime (729329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9077 + ... + 9156.

2⁷²⁹³²⁰ is an apocalyptic number.

It is an amenable number.

729320 is an abundant number, since it is smaller than the sum of its proper divisors (911740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

729320 is a wasteful number, since it uses less digits than its factorization.

729320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18244 (or 18240 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 729320 is about 854.0023419172. The cubic root of 729320 is about 90.0131667979.

The spelling of 729320 in words is "seven hundred twenty-nine thousand, three hundred twenty".